Electric lamp



L. C. KUEHNER. ELECTRIC LAM?.

l APPLICATION FILED IUNE 23, |920. 1,416,096. Patented May 16, 1922,A

2 SHEETS-SHEET l.

L. C. KUEHNER.

ELECTRIC LAMP.

APPLICATION FILED JUNE 23, 1920. l 1,416,096. Patented May-16, 1922.

2 SHEETS-SHEET 2.

Louis c. nuninvnn, or' sfr. Louis, ircissonnnnssienoa 'To HANDLeN-encir MANU- FACTURING COMPANY, OI

iaieeae.

Lo'oi's, iviissouni, A` CORPORATION' or 'Specification of Letters"Patent.

MISSOURI.

Patented May 16,1922.

`- .Application :ined June 23,1920. seriali no. 391,172. i v

To all iii/0m t may concern: T

Be it known 'that I, Louis C. iunnivniz, a citi/zen `ci the United States of Alnerica,

a resident of the city of St. Louis, inthe' State ci liIissouri, have invented `certain new and useful Improvements in Electric Lamps, of which the yl'ollowing is -a full, olea-if, and eXactdescri-ption, reference being had tothe accompanying drawings,`formi-ng aparto'fthis specification. v

My invention relates lto electric lamps Aand it lis especially vadapted for use in signal lamps in the form o -f lanterns. The ymain Object of my inventionis ,to provide a sujpportier the lamp bulb which Vshall be adjustable so that the source of light maybe adjusted to and maintained at the focal :point ofthe lens.

My yinvention provides Lfor the use off any shape or 4size .of bulb or filament and it @enf ables the various `diri-'errent bulbs to bev accuratelyadjusted to the mostfdesirable lfocal relation tothe lens. n

Fig. I is -an'elevation -ofza signal Llamp with parts broken away vto show my invention applied. p n

.II is an enlarged vertical ysection takenI approximately `on fthe line III'I of Fig. j,

j Fig. lIII is a planview of -the lamp support as viewed Ifrom above.

Fig. IV is 1a. view similar to -Fig. 'I,illus trating another1 form l.of the invention.

Fig. Vis an enlarged top or plan View of the lamp support shown in Fig. IV.

Fig. VI is a vertical section taken through the telescoping supporting members shown in Fig..IV

F ig. VII is a top or plan View of the elements shown in Fig. VI.

In Figs. I, II and III of the drawings is shown a signal lamp having a shell or casing A, a base B and a hooded cap C. A lens D is secured to the casing A and has the usual guard E. Attached to the inner surface of the casing wall is the adjustable support F, said support comprising' a vertical or upright member l which is bent at its upper end to form a horizontal supporting arm 2 which extends inwardly from the casing wall. Elongated slots 3 are provided in the upright portion l, these slots beingin vertical alinement and adapted to receive adjustable tightening devices in the form of bolts I which pass through the casing wall, y

said bolts being threaded at their linner ends to receive nuts 5 by which `the upright may be adjfustably secured to thecasing.` lVashers 16 may be inserted tbetweentlie vnuts and upright. f 4 Slidableion :the .laterally bent portion 2 of the upright is a lateral extension member 7, said lateral member 7 `carrying the socket S at one end and Ahaving an elongated slot 9 near its other end, adapted to receive a screw l0 which' passes through the slot and into a threaded aperture inthe portion 2 of the upright member. A washer l1 may be-insorted between lth'e screw il@ and a lateral member 7.`

. .Thevertical slots 3 of the upright member provide for vertical vadjustment of the socketfsupport, and the slot andscrew connection between .the member 7 and the hori-` zontal'extension 7 of ythe upright 2 provides foi-.a pivotal rmovement of y the member 7 upony .the Lscrew 10 and alsof for a horizontal adjustment longitudinally fof member I7. The member relative'to fthe portion 2 a rdistance equalr to the llength of Ythe slot 9.` lThe socket `8 .is suitably threadedto `receive a bulb 12 and 7 maybe moved horizontally is also adapted tol lreceive an velectrical conyprovided with a guard F.

The adjustable supportshown in Figs. IV to VII comprises a tubular upright member l having a flanged foot 2 which may be secured to the base B in any suitable manner. The base B has an aperture 3 in alinenient with the bore of the tubular upright member l. The upright member l is split (Figs. VI and VII) preferably at its upper end in order to provide a resilient clamping portion and has attached to it a clamping `ring 4c carrying a tightening screw 5. f

Pivotally mounted in the upright 1 and telescoping therewith is another tubular member 6, preferably made of insulating material such as pressed fibre, said tubular member 6 being adapted to pass through the opening 3 in the base B and is held in position withinthe member 1 by the clamping ring Al. To the upper end of the member 6 is attached a pair of horizontally adjust able members 7 and 8, the member 7 including a collar 9 secured to the member 6. rlhe members 7 and 8 are slidable relative to each other, one of them as `for example 8', being provided with an elongated slot 10 and the other member 7 being apertured and threaded to receive tightening screw 11 which passes through the aperture in one member and the slot in the other. The end or the member 8 adjacent the member 6 is forked at 12v so as to embrace theeollar 9 and thus be guided in a straight line longitudinally of the slot 10 |The other end of the member 8 is provided with a socket 13 adapted to receive an electric lamp bulb let. A. conducting cord 15 is attached to the socket 13 and extends through the tubular member 6 and is connected to any suitable source or electrical energy.

Vhenever it is desired to adjust the support to accurately locate the bulb at the focal point or the lens, the member 8 may be moved relative t0 the member 7 by first loosening` the screw 11, and it any vertical adjustment is required, the clamping means 4t is released and the tubular member 6 is raised or lowered in the 'hollow upright 1. The tubular upright 1 allows of the pivotal adjustment of the member 6 and its attached horizontal members.

From the foregoing it will be understood that bulbs and iilaments of different shapes and diiiferent sizes can be accurately adjusted to the focal point of the lens. Furthermore, in small bulbs the filaments are not accurately located centrally of thebulbs and it is therefore desirable to adjust the lamp socket whenever a new .bulb is inserted therein, the object being to locate the lilament in the most eifeetive position relative to the lens.

I claim:

1. A lamp having a casing, a lens, a lamp socket adapted to receive a bulb, and supporting means for said lamp socket, said supporting means comprising a slotted upright member bent to form a supporting arm at one end, retaining means extending` through the slot in said slotted upright member whereby the upright member may be retained in different vertical positions, a lateral extension member having an elongated slot therein, said lamp socket being e carried by said lateral extension member, and `retaining means extending through said slot in the lateral extension member and through said supporting arm of the upright member whereby the lateral extension member is pivoted to and horizontally adjustable relative to said upright member.

2. A lamp having a casing, a lens, a lamp socket adapted to receive a bulb, and a lampsupporting device whereby said lamp socket may be adjusted relative to said lens, said lamp-supporting device comprising an upright supporting member adjustable verticall)T relative to said lens, a supporting arm extending from said upright supporting member, said supporting arm having an extension secured to and supporting said lamp socket, said extension being adjustabley in a straight line relative to said arm so as to move said lamp socket toward and away 'from said lens, said extension being also adjustable horizontally in an arc of a circle, and a screw whereby said extension is secured to said supporting arm. v l l In testimony that I claim the foregoing I hereunto affix my signature. I

Louis c. kunnnen. 

